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(2x+3)(2x+5)....use the correct formula and answer.

it can be done using identity [x+a][x+b]=x^2+[a+b]x+ab
[2x+3][2x+5]=2x^2+[3+5]3*5 =4x^2+8*15 =4x^2+120


(2x+3)(2x+5)=2x(2x+5)+3 (2x+5).........................=4x(sq)+10x+6x+15=4xsq+16x+15
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Plz mark my answer as the best if it is correct.
but the question is using the formula
Means? Accha using identities?
not neccesary that using identity we can use formula also
Like tthat (a+b)(a+c)=.....?
4x^2 + 10x + 6x +15
4x^2+16x+15 is the answer.....
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